Squeeze-type anchor rod with internally hidden cartridge

Abstract

A squeeze-type anchor rod with an internally hidden cartridge. The squeeze-type anchor rod comprises a first hollow anchor rod body (1) and a second hollow anchor rod body (2), wherein a cartridge (3) is provided inside the first hollow anchor rod body (1); the second hollow anchor rod body (2) is connected to the first hollow anchor rod body (1), and the second hollow anchor rod body (2) moves forward relative to the first hollow anchor rod body (1) in the axial direction of the first hollow anchor rod body (1), and squeezes an adhesive inside the cartridge (3) out of the first hollow anchor rod body (1) into an anchor hole; and when the adhesive inside the cartridge (3) is completely squeezed out of the first hollow anchor rod body (1), the second hollow anchor rod body (2) rotates and drives the first hollow anchor rod body (1) to rotate synchronously. The anchor rod has a simple structure; by means of the provision of two sections of anchor rods with different diameters, the cartridge (3) can be hidden inside; and by means of merely rotating the second hollow anchor rod body (2), resin in the internally hidden cartridge (3) can be pushed into the anchor hole, and the resin in the anchor hole can be stirred.

Description

Compression-type internal medicine roll anchor bolt Technical Field

[0001] This invention relates to the field of anchor bolt support technology, and in particular to a compression-type internally loaded drug roll anchor bolt. Background Technology

[0002] Currently, in the fields of geotechnical engineering, mining, and tunneling, anchor bolt support is commonly used, with resin anchor bolts and mortar anchor bolts being the most common types. In mine roadway support systems, resin anchor bolts have the advantages of short curing time and rapid stress application, but the cost of resin materials is very high.

[0003] The construction process of resin anchor bolts is as follows: (1) drilling anchor holes, (2) sending resin rolls into anchor holes, (3) inserting anchor bolts, and (4) rotating anchor bolts to break up resin rolls, so that the resin rolls are mixed and solidified before anchoring the anchor bolts. In the second step, the resin rolls are usually pushed directly into the bottom of the anchor hole by high-pressure water or high-pressure air. However, during use, due to factors such as the anchor hole axis not being a standard straight line (i.e., the hole is not straight), the large friction between the resin roll and the anchor hole, and the resin roll itself being soft and having poor guiding properties, it is difficult to deliver the resin rolls into place. To solve the aforementioned problems, the prior art provides a one-step resin roll prestressed hollow anchor bolt, such as the patent with publication number CN114542143A, which places the resin roll inside the anchor bolt. When the resin is sent into the anchor hole, it is only necessary to insert the anchor bolt into the anchor hole and then push the resin out of the anchor hole by pressurized liquid.

[0004] However, while the aforementioned methods can solve the problem of resin roll feeding, in actual production and application, the built-in resin mixer is used only once, which increases the production cost of anchor bolts. Secondly, the grouting connector used to ensure resin anchoring before grouting increases the anchor bolt production process and production cost. Furthermore, the use of pressure generators not only increases the area occupied by the equipment on the construction site but also poses safety hazards. Technical issues

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a compression-type internal medicine roll anchor rod with a simple structure. It achieves internal medicine roll concealment by setting two anchor rods with different diameters, and the resin inside the internal medicine roll can be pushed out to the anchor hole and the resin inside the anchor hole can be stirred simply by rotating the second hollow anchor rod body. Technical solutions

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] The compression-type internally packed medicine roll anchor bolt includes a first hollow anchor bolt body and a second hollow anchor bolt body;

[0008] The first hollow anchor body has a cartridge inside;

[0009] The second hollow anchor body is connected to the first hollow anchor body. When the second hollow anchor body rotates, it moves forward along the axial direction of the first hollow anchor body relative to it, and squeezes the adhesive in the cartridge from the first hollow anchor body into the anchor hole. When the adhesive in the cartridge is completely squeezed out of the first hollow anchor body, the second hollow anchor body continues to rotate and drives the first hollow anchor body to rotate synchronously.

[0010] Furthermore, the end of the first hollow anchor body is provided with a limiting member, which is used to restrict the first hollow anchor body from rotating synchronously with the second hollow anchor body when the second hollow anchor body moves forward relative to the first hollow anchor body along the axial direction of the first hollow anchor body, and is also used to cut the medicine roll.

[0011] Furthermore, the limiting member includes a connecting sleeve, a nail head, and a breaking blade. The connecting sleeve is connected to the end of the first hollow anchor rod body. There are at least two nail heads, and the nail heads are disposed at the end of the connecting sleeve. The breaking blade is disposed at the opening of the connecting sleeve and is arranged radially along the connecting sleeve.

[0012] Furthermore, the connecting sleeve is threadedly connected to the end of the hollow anchor rod body.

[0013] Furthermore, the first hollow anchor body is threadedly connected to the second hollow anchor body.

[0014] Furthermore, the first hollow anchor body is provided with internal threads, and the external threads of the second hollow anchor body are adapted to the internal threads.

[0015] Furthermore, the drug cartridge is disposed between the crushing blade and the end of the second hollow anchor rod. Beneficial effects

[0016] 1) The anchor structure of the present invention is simple. It achieves the internal storage of the medicine roll by setting two anchors with different diameters, and the resin inside the internal medicine roll can be pushed out to the anchor hole and the resin inside the anchor hole can be stirred by simply rotating the second hollow anchor body.

[0017] 2) The anchor rod of the present invention only needs to provide a drive for rotation of the second hollow anchor rod body to achieve the aforementioned functions, which has low equipment requirements and is more conducive to on-site construction; at the same time, the simple structure of the anchor rod of the present invention can significantly reduce the production cost of the anchor rod. Attached Figure Description

[0018] Figure 1 is a perspective view of the extrusion-type internal medicine roll anchor bolt in an embodiment of the present invention;

[0019] Figure 2 is a cross-sectional view of the compression-type internal medicine roll anchor rod in an embodiment of the present invention;

[0020] Figure 3 is an enlarged view of part A in Figure 2;

[0021] Figure 4 is an enlarged schematic diagram of part B in Figure 2;

[0022] In the figure, 1. First hollow anchor bolt body; 2. Second hollow anchor bolt body; 3. Explosive cartridge; 4. Limiting component; 5. Connecting sleeve; 6. Nail head; 7. Breaker blade. Modes for Carrying Out the Invention

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Referring to Figures 1-4, the present invention provides a technical solution: Example

[0025] As shown in Figures 1-4, a compression-type internal medicine roll anchor bolt includes a first hollow anchor bolt body 1 and a second hollow anchor bolt body 2;

[0026] The first hollow anchor body 1 has a cartridge 3 inside;

[0027] The second hollow anchor body 2 is connected to the first hollow anchor body 1. When the second hollow anchor body 2 rotates, it moves forward along the axial direction of the first hollow anchor body 1 relative to the first hollow anchor body 1, and squeezes the adhesive in the cartridge 3 from the first hollow anchor body 1 into the anchor hole. When the adhesive (two-component resin) in the cartridge 3 is completely squeezed out of the first hollow anchor body 1, the second hollow anchor body 2 continues to rotate and drives the first hollow anchor body 1 to rotate synchronously, stirring the adhesive.

[0028] The end of the first hollow anchor rod body 1 is provided with a limiting member 4. The limiting member 4 is used to restrict the first hollow anchor rod body 1 from rotating synchronously with the second hollow anchor rod body 2 when the second hollow anchor rod body 2 moves forward relative to the first hollow anchor rod body 1 along the axial direction of the first hollow anchor rod body 1, and is also used to cut the medicine roll 3.

[0029] As shown in Figures 1 and 3, the limiting member 4 includes a connecting sleeve 5, a nail head 6, and a breaking blade 7. The connecting sleeve 5 is connected to the end of the first hollow anchor rod body 1. There are at least two nail heads 6 (in this embodiment, three nail heads 6 and three breaking blades 7 are provided), and the nail heads 6 are provided at the end of the connecting sleeve 5. The breaking blade 7 is provided at the opening of the connecting sleeve 5 and is arranged radially along the connecting sleeve 5.

[0030] The nail head 6 is used for: 1. Providing friction when the anchor hole is in rock; when the anchor hole is in soil, the nail head 6 partially gets stuck in the soil, thereby restricting the first hollow anchor body 1 from rotating synchronously with the second hollow anchor body 2; 2. The nail head 6 creates a certain gap between the end of the first hollow anchor body 1 and the bottom of the anchor hole, which ensures that the resin in the cartridge 3 can smoothly enter the anchor hole, preventing the resin from being unable to enter the anchor hole when the end of the first hollow anchor body 1 is pressed against the bottom of the anchor hole.

[0031] The connecting sleeve 5 is threaded to the end of the hollow anchor rod body (in addition, the connecting sleeve 5 can also be welded to the hollow anchor rod body or integrally formed with the hollow anchor rod body).

[0032] The first hollow anchor body 1 is threadedly connected to the second hollow anchor body 2.

[0033] As shown in Figures 2 and 4, the first hollow anchor body 1 has an internal thread, and the external thread of the second hollow anchor body 2 is adapted to the internal thread. Alternatively, the second hollow anchor body 2 can also have an internal thread, and the external thread of the first hollow anchor body 1 is adapted to the internal thread of the second hollow anchor body 2 (i.e., the inner diameter of the second hollow anchor body 2 is adapted to the outer diameter of the first hollow anchor body 1). In this case, only a push rod coaxial with the second hollow anchor body 2 needs to be installed inside the second hollow anchor body 2 to push out the grout roll 3 when the second hollow anchor body 2 moves forward. When installing the push rod, the outer diameter of the push rod is smaller than the diameter of the inner hole of the first hollow anchor body 1. For convenient grouting, the push rod can be a hollow rod with open ends.

[0034] The medicine roll 3 is disposed between the crusher 7 and the end of the second hollow anchor rod 2.

[0035] Working principle: (1) The drilling machine drills the anchor hole.

[0036] (2) Insert the extrusion-type internal medicine roll 3 anchor rod into the drilled anchor hole, and make the nail head 6 at the end of the first hollow anchor rod body 1 contact the bottom of the anchor hole. The end of the second hollow anchor rod body 2 away from the first hollow anchor rod body 1 is connected to the drilling machine. After connection, the drilling machine moves horizontally towards the bottom of the anchor hole, so that the nail head 6 is pressed against the bottom of the anchor hole.

[0037] (3) Start the drilling rig, which drives the second hollow anchor body 2 to rotate. During this process, since the nail head 6 is pressed against the bottom of the anchor hole, the resistance between the first hollow anchor body 1 and the bottom of the anchor hole is greater than the frictional resistance of the relative rotation of the threaded pair (the first hollow anchor body 1 and the second hollow anchor body 2); that is, the second hollow anchor body 2 is more likely to overcome the frictional resistance of the relative rotation of the threaded pair. At this time, the second hollow anchor body 2 rotates relative to the first hollow anchor body 1 under the action of the drilling rig, and the second hollow anchor body 2 moves forward along the axial direction of the first hollow anchor body 1.

[0038] During the forward movement of the second hollow anchor rod 2, the end of the second hollow anchor rod 2 pushes the cartridge 3 toward the limiting member 4. When the cartridge 3 contacts the limiting member 4, as the second hollow anchor rod 2 continues to push, the cartridge 3 is cut by the crushing blade 7, and the (two-component) resin inside the cartridge 3 is squeezed into the anchor hole.

[0039] (4) When the second hollow anchor body 2 moves to the end of the first hollow anchor body 1, the explosive cartridge 3 inside the first hollow anchor body 1 is completely squeezed out. At this time, the second hollow anchor body 2 moves to its limit position and can no longer continue to advance along the axial direction of the first hollow anchor body 1.

[0040] As the second hollow anchor body 2 continues to rotate, it drives the first hollow anchor body 1 to rotate synchronously. (During this process, to ensure smoother synchronous rotation of the first and second hollow anchor bodies 1 and 2, the drilling rig can be retracted a certain distance, thereby reducing the force exerted by the limiting component 4 against the bottom of the anchor hole.) The rotation of the first and second hollow anchor bodies 1 and 2 stirs the (two-component) resin within the anchor hole, thereby mixing the resin and accelerating its solidification.

[0041] (5) Grouting can be carried out after the resin solidifies. Grouting can be carried out by setting grouting holes on the first hollow anchor body 1 and the second hollow anchor body 2 respectively. When the second hollow anchor body 2 moves to the limit position, the two grouting holes are aligned, so that the anchor hole is connected to the inside and outside of the anchor body, and the grout can enter the anchor hole through the grouting holes.

[0042] The anchor bolt structure of this invention is simple. It achieves the internal containment of the drug cartridge by setting two anchor bolts with different diameters, and the resin inside the internal drug cartridge can be pushed out of the anchor hole and stirred by simply rotating the second hollow anchor bolt body. The anchor bolt of this invention only needs to provide a drive for the rotation of the second hollow anchor bolt body to achieve the aforementioned functions, which has low equipment requirements and is more conducive to on-site construction. At the same time, the simple structure of the anchor bolt of this invention can significantly reduce the production cost of the anchor bolt.

[0043] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A compression-type internally stored medicine roll anchor bolt, characterized in that: Includes a first hollow anchor body and a second hollow anchor body; The first hollow anchor body has a cartridge inside; The second hollow anchor body is connected to the first hollow anchor body. The second hollow anchor body moves forward along the axial direction of the first hollow anchor body relative to the first hollow anchor body, and squeezes the adhesive in the cartridge from the first hollow anchor body into the anchor hole. The second hollow anchor body rotates and drives the first hollow anchor body to rotate and stir the adhesive.

2. The compression-type internal medicine roll anchor bolt according to claim 1, characterized in that: The end of the first hollow anchor body is provided with a limiting member, which is used to restrict the first hollow anchor body from rotating synchronously with the second hollow anchor body when the second hollow anchor body moves forward relative to the first hollow anchor body along the axial direction of the first hollow anchor body, and is also used to cut the medicine roll.

3. The extrusion-type internally packed medicine roll anchor bolt according to claim 2, characterized in that: The limiting component includes a connecting sleeve, nail heads, and a breaking blade. The connecting sleeve is connected to the end of the first hollow anchor rod body. There are at least two nail heads, and the nail heads are located at the end of the connecting sleeve. The breaking blade is located at the opening of the connecting sleeve and is arranged radially along the connecting sleeve.

4. The extrusion-type internally packed medicine roll anchor bolt according to claim 3, characterized in that: The connecting sleeve is threadedly connected to the end of the hollow anchor rod body.

5. The extrusion-type internally packed medicine roll anchor bolt according to claim 3, characterized in that: The first hollow anchor body is threadedly connected to the second hollow anchor body.

6. The extrusion-type internally packed medicine roll anchor bolt according to claim 5, characterized in that: The first hollow anchor body is provided with internal threads, and the external threads of the second hollow anchor body are adapted to the internal threads.

7. The extrusion-type internally packed medicine roll anchor bolt according to claim 6, characterized in that: The medicine roll is disposed between the crusher and the end of the second hollow anchor rod.

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